2.3.3 nPORESET handling

nPORESET is combined with the masked and combined reset requests from watchdog timers, the RESETREQ input, the SWRESETREQ register value, and the negative-edge detect and stretched signal of nSRST. This generates the internal combined system Cold reset signal nPORESETAON, which resets almost all logic within the system.

Note:

nPORESETAON resets the PPU, in each
PPU-controlled power domain.
The PPU then resets the other logic in the domain using its reset pins: